发布求助
文献互助 智能选刊 最新文献

Acta Physica Hungarica A) Heavy Ion Physics最新文献

筛选
英文 中文
Quasiparticle picture of quarks near chiral phase transition 接近手性相变的夸克的准粒子图象
Acta Physica Hungarica A) Heavy Ion Physics Pub Date : 2005-10-28 DOI: 10.1556/APH.27.2006.2-3.36
M. Kitazawa, T. Kunihiro, Y. Nemoto
{"title":"Quasiparticle picture of quarks near chiral phase transition","authors":"M. Kitazawa, T. Kunihiro, Y. Nemoto","doi":"10.1556/APH.27.2006.2-3.36","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.36","url":null,"abstract":"We study how the quasiparticle picture of the quark can be modified near but above the critical temperature (Tc) of the chiral phase transition; we incorporate into the quark self-energy the effects of the precursory soft modes of the phase transition, i.e. ‘para-σ(π) meson’. It is found that the quark spectrum has a three-peak structure near Tc: We show that the additional new spectra originate from the mixing between a quark (antiquark) and an antiquark-hole (quark-hole) caused by a “resonant scattering” of the quasi-fermions with the thermally-excited soft modes.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132350131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Jet-medium interactions: Wakes in the QCD medium 射流-介质相互作用:QCD介质中的尾迹
Acta Physica Hungarica A) Heavy Ion Physics Pub Date : 2005-10-28 DOI: 10.1556/APH.27.2006.2-3.20
J. Ruppert
{"title":"Jet-medium interactions: Wakes in the QCD medium","authors":"J. Ruppert","doi":"10.1556/APH.27.2006.2-3.20","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.20","url":null,"abstract":"We calculate the wake induced in a hot, dense QCD medium by a fast parton in the framework of linear response theory. We discuss two different scenarios: i) a weakly coupled quark gluon plasma (pQGP) described by hardthermal loop (HTL) perturbation theory and ii) a scenario where the plasma has the properties of a quantum liquid. We show that a Mach cone can appear in the second scenario, but not in the first one.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126672694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Gluon shadowing and unitarity effects 胶子阴影和统一性效应
Acta Physica Hungarica A) Heavy Ion Physics Pub Date : 2005-10-28 DOI: 10.1556/APH.27.2006.2-3.27
K. Tywoniuk, I. Arsene, L. Bravina, A. Kaidalov, E. Zabrodin
{"title":"Gluon shadowing and unitarity effects","authors":"K. Tywoniuk, I. Arsene, L. Bravina, A. Kaidalov, E. Zabrodin","doi":"10.1556/APH.27.2006.2-3.27","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.27","url":null,"abstract":"New data from HERA experiment on deep inelastic scattering have been used to parametrize nucleon and Pomeron structure functions. Within the Gribov theory, the parameterizations were employed to calculate gluon shadowing for various heavy ions. The latter was compared with predictions from other models. Calculations of multiplicity reduction due to gluon shadowing for d+Au collisions at forward rapidities at √sNN=200 GeV are in good agreement with BRAHMS data on the nuclear modification factor.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122179519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Dissipation and fragmentation of low- Q 2 scattered partons in Au−Au collisions at RHIC RHIC中Au - Au碰撞中低q2散射子的耗散和破碎
Acta Physica Hungarica A) Heavy Ion Physics Pub Date : 2005-10-27 DOI: 10.1556/APH.27.2006.2-3.18
Star Collaboration, R. Ray, M. Daugherity
{"title":"Dissipation and fragmentation of low- Q 2 scattered partons in Au−Au collisions at RHIC","authors":"Star Collaboration, R. Ray, M. Daugherity","doi":"10.1556/APH.27.2006.2-3.18","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.18","url":null,"abstract":"Two-particle correlations and event-wise fluctuations in transverse momentum p\u0000 tare reported for Au−Au collisions at √s\u0000 NN\u0000 =62 and 200 GeV on pseudorapidity η and azimuth ϕ. Distributions of all pairs of particles (no leading trigger particle) reveal jet-like correlations, or peaks at pair-wise opening angles of order 1 radian or less. The width of this same-side correlation peak increases dramatically on pseudorapidity and decreases on azimuth for increasing collision centrality. Evolution of the same-side peak with centrality suggests dissipation of low-Q\u0000 2 partons via strong couplign to an expanding bulk medium. p\u0000 t correlations, which provide access to temperature and/or velocity distributions in the colliding system, are also presented.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123148135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
All Orders Transport Theory from the Multiple Scattering Expansion of the Self-Energy: The Central Cuts 自能多重散射展开的全阶输运理论:中心切割
Acta Physica Hungarica A) Heavy Ion Physics Pub Date : 2005-10-27 DOI: 10.1556/APH.27.2006.2-3.35
Jean-Sébastien Gagnon, F. Fillion-Gourdeau, Sangyong Jeon
{"title":"All Orders Transport Theory from the Multiple Scattering Expansion of the Self-Energy: The Central Cuts","authors":"Jean-Sébastien Gagnon, F. Fillion-Gourdeau, Sangyong Jeon","doi":"10.1556/APH.27.2006.2-3.35","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.35","url":null,"abstract":"We use the full multiple scattering expansion of the retarded self-energy to obtain the gain and loss rates present in the Kadanoff-Baym relativistic transport equation. The rates we obtain include processes with any number of particles. As a first approximation, we only consider central cuts in the self-energies, but otherwise our results are general. We specialize to the case of scalar field theory to compare with lowest order results. The main application of this work is relativistic transport theory of very dense systems, such as the quark-gluon plasma or the early universe, where multi-particle interactions are important.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114948456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Heavy Ion e + e - Pairs to All Orders in Z α 重离子e + e - Z α中各阶对
Acta Physica Hungarica A) Heavy Ion Physics Pub Date : 2005-10-27 DOI: 10.1556/APH.27.2006.2-3.31
A. Baltz
{"title":"Heavy Ion e + e - Pairs to All Orders in Z α","authors":"A. Baltz","doi":"10.1556/APH.27.2006.2-3.31","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.31","url":null,"abstract":"The heavy ion cross section for continuum e+e− pair production has been calculated to all orders in Zα. Comparison is made with available CERN SPS and RHIC STAR data. Computed cross sections are found to be reduced from perturbation theory with increasing charge of the colliding heavy ions and for all energy and momentum regions investigated. Au or Pb total cross sections are reduced by 28% (SPS), 17% (RHIC) and 11% (LHC). For very high energy (E e +, E e −>3 GeV) forward pairs at LHC the reduction from perturbation theory is a bit larger (17%). Use of zero degree calorimeter triggering (and thus small impact parameter weighting) makes impact parameter representation of exact pair production useful. Preliminary exact calculations in the zero impact parameter limit show a much larger reduction from perturbation theory (about 40%) at both RHIC and LHC.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123834991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Freeze-out in narrow and wide layers 冻结成窄层和宽层
Acta Physica Hungarica A) Heavy Ion Physics Pub Date : 2005-10-20 DOI: 10.1556/APH.27.2006.2-3.38
V. Magas, L. Csernai, Etele Molnár
{"title":"Freeze-out in narrow and wide layers","authors":"V. Magas, L. Csernai, Etele Molnár","doi":"10.1556/APH.27.2006.2-3.38","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.38","url":null,"abstract":"The freeze-out of particles from a layer of finite thickness is discussed in a phenomenological kinetic model. The proposed model, based on the Modified Boltzman Transport Equation, is Lorentz invariant and can be applied equally well for the freeze-out layers with space-like and time-like normal vectors. It leads to non-equilibrated post freeze-out distributions. The dependence of the resulting distribution on the thickness of the layer is presented and discussed for a space-like freeze-out scenario.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126952425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Di-jet correlation in Au+Au and Cu+Cu Collisions from PHENIX 来自PHENIX的Au+Au和Cu+Cu碰撞中的双喷流相关
Acta Physica Hungarica A) Heavy Ion Physics Pub Date : 2005-10-20 DOI: 10.1556/APH.27.2006.2-3.12
J. Jia
{"title":"Di-jet correlation in Au+Au and Cu+Cu Collisions from PHENIX","authors":"J. Jia","doi":"10.1556/APH.27.2006.2-3.12","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.12","url":null,"abstract":"PHENIX has measured the two-particle azimuth correlation in Au+Au at √s=200 GeV. Jet shape and yield at the away side are found to be strongly modified at intermediate and low p T, and the modifications vary dramatically with p T and centrality. At high p T, away side jet peak reappears but the yield is suppressed. Similar jet strength is found for Au+Au and Cu+Cu collisions with similar number of participant nucleons.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129864381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Covariant kinetic freeze-out description through a finite space-time layer 有限时空层的协变动力学冻结描述
Acta Physica Hungarica A) Heavy Ion Physics Pub Date : 2005-10-19 DOI: 10.1556/APH.27.2006.2-3.40
E. Molnár, L. Csernai, V. Magas
{"title":"Covariant kinetic freeze-out description through a finite space-time layer","authors":"E. Molnár, L. Csernai, V. Magas","doi":"10.1556/APH.27.2006.2-3.40","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.40","url":null,"abstract":"The problem of freeze-out (FO) in high energy heavy ion reactions is addressed. We develop and analyze a covariant FO description valid for a finite space-time layer.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134543427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
The influence of flow on the jet quenching power in heavy-ion collisions 流动对重离子碰撞射流淬火功率的影响
Acta Physica Hungarica A) Heavy Ion Physics Pub Date : 2005-10-14 DOI: 10.1556/APH.27.2006.2-3.19
T. Renk
{"title":"The influence of flow on the jet quenching power in heavy-ion collisions","authors":"T. Renk","doi":"10.1556/APH.27.2006.2-3.19","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.19","url":null,"abstract":"The flow pattern and evolution of the medium created in ultrarelativistic heavy ion collisions can have significant influence on the energy loss of hard partons traversing the medium. We demonstrate that within a range of assumptions for longitudinal and transverse flow which are all compatible with the measured hadronic single particle distributions, the quenching power of the medium can vary within a factor five. Thus, the choice of the medium evolution is one of the biggest uncertainties in jet quenching calculations and needs to be addressed with some care.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132165783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信